package com.dcits.util.tomcat;

import java.lang.management.MemoryUsage;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

public class Demo {
	 /** 
     * main方法 
     * @param args 
     */  
    @SuppressWarnings({ "rawtypes", "unchecked", "unused" })
	public static void main(String[] args) {  
        try {  
  
            String jmxURL = "service:jmx:rmi:///jndi/rmi://127.0.0.1:8999/jmxrmi";  
  
            JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);  
  
            Map map = new HashMap();  
            String[] credentials = new String[] { "monitorRole", "tomcat" };  
            map.put("jmx.remote.credentials", credentials);  
            JMXConnector connector = JMXConnectorFactory.connect(serviceURL);  
            MBeanServerConnection mbsc = connector.getMBeanServerConnection();  
  
           /* // 端口最好是动态取得  
            ObjectName threadObjName = new ObjectName(  
                    "Catalina:type=ThreadPool,name=http-apr-8080");  
            MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);  
  
            String attrName = "currentThreadCount";// tomcat的线程数对应的属性值  
            MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();  
            System.out.println("currentThreadCount:"  
                    + mbsc.getAttribute(threadObjName, attrName));  */
  
            // heap  
            for (int j = 0; j < mbsc.getDomains().length; j++) {  
                System.out.println("###########" + mbsc.getDomains()[j]);  
            }  
            Set MBeanset = mbsc.queryMBeans(null, null);  
            System.out.println("MBeanset.size() : " + MBeanset.size());  
            Iterator MBeansetIterator = MBeanset.iterator();  
            while (MBeansetIterator.hasNext()) {  
                ObjectInstance objectInstance = (ObjectInstance) MBeansetIterator  
                        .next();  
                ObjectName objectName = objectInstance.getObjectName();  
                String canonicalName = objectName.getCanonicalName();  
                System.out.println("canonicalName : " + canonicalName);  
                if (canonicalName  
                        .equals("Catalina:host=localhost,type=Cluster")) {  
                    // Get details of cluster MBeans  
                    System.out.println("Cluster MBeans Details:");  
                    System.out  
                            .println("=========================================");  
                    // getMBeansDetails(canonicalName);  
                    String canonicalKeyPropList = objectName  
                            .getCanonicalKeyPropertyListString();  
                }  
            }  
            // ------------------------- system ----------------------  
            ObjectName runtimeObjName = new ObjectName("java.lang:type=Runtime");  
            System.out.println("厂商:"  
                    + (String) mbsc.getAttribute(runtimeObjName, "VmVendor"));  
            System.out.println("程序:"  
                    + (String) mbsc.getAttribute(runtimeObjName, "VmName"));  
            System.out.println("版本:"  
                    + (String) mbsc.getAttribute(runtimeObjName, "VmVersion"));  
            Date starttime = new Date((Long) mbsc.getAttribute(runtimeObjName,  
                    "StartTime"));  
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
            System.out.println("启动时间:" + df.format(starttime));  
  
            Long timespan = (Long) mbsc.getAttribute(runtimeObjName, "Uptime");  
            System.out.println("连续工作时间:" + Demo.formatTimeSpan(timespan));  
            // ------------------------ JVM -------------------------  
            // 堆使用率  
            ObjectName heapObjName = new ObjectName("java.lang:type=Memory");  
            MemoryUsage heapMemoryUsage = MemoryUsage  
                    .from((CompositeDataSupport) mbsc.getAttribute(heapObjName,  
                            "HeapMemoryUsage"));  
            long maxMemory = heapMemoryUsage.getMax();// 堆最大  
            long commitMemory = heapMemoryUsage.getCommitted();// 堆当前分配  
            long usedMemory = heapMemoryUsage.getUsed();  
            System.out.println("heap:" + (double) usedMemory * 100  
                    / commitMemory + "%");// 堆使用率  
  
            MemoryUsage nonheapMemoryUsage = MemoryUsage  
                    .from((CompositeDataSupport) mbsc.getAttribute(heapObjName,  
                            "NonHeapMemoryUsage"));  
            long noncommitMemory = nonheapMemoryUsage.getCommitted();  
            long nonusedMemory = heapMemoryUsage.getUsed();  
            System.out.println("nonheap:" + (double) nonusedMemory * 100  
                    / noncommitMemory + "%");  
  
            ObjectName permObjName = new ObjectName(  
                    "java.lang:type=MemoryPool,name=Perm Gen");  
            MemoryUsage permGenUsage = MemoryUsage  
                    .from((CompositeDataSupport) mbsc.getAttribute(permObjName,  
                            "Usage"));  
            long committed = permGenUsage.getCommitted();// 持久堆大小  
            long used = heapMemoryUsage.getUsed();//  
            System.out.println("perm gen:" + (double) used * 100 / committed  
                    + "%");// 持久堆使用率  
  
            // -------------------- Session ---------------  
            ObjectName managerObjName = new ObjectName(  
                    "Catalina:type=Manager,*");  
            Set<ObjectName> s = mbsc.queryNames(managerObjName, null);  
            for (ObjectName obj : s) {  
                System.out.println("应用名:" + obj.getKeyProperty("context"));  
                ObjectName objname = new ObjectName(obj.getCanonicalName());  
                System.out.println("最大会话数:"  
                        + mbsc.getAttribute(objname, "maxActiveSessions"));  
                System.out.println("会话数:"  
                        + mbsc.getAttribute(objname, "activeSessions"));  
                System.out.println("活动会话数:"  
                        + mbsc.getAttribute(objname, "sessionCounter"));  
            }  
  
            // ----------------- Thread Pool ----------------  
            ObjectName threadpoolObjName = new ObjectName(  
                    "Catalina:type=ThreadPool,*");  
            Set<ObjectName> s2 = mbsc.queryNames(threadpoolObjName, null);  
            for (ObjectName obj : s2) {  
                System.out.println("端口名:" + obj.getKeyProperty("name"));  
                ObjectName objname = new ObjectName(obj.getCanonicalName());  
                System.out.println("最大线程数:"  
                        + mbsc.getAttribute(objname, "maxThreads"));  
                System.out.println("当前线程数:"  
                        + mbsc.getAttribute(objname, "currentThreadCount"));  
                System.out.println("繁忙线程数:"  
                        + mbsc.getAttribute(objname, "currentThreadsBusy"));  
            }  
  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    @SuppressWarnings("resource")
	public static String formatTimeSpan(long span) {  
        long minseconds = span % 1000;  
  
        span = span / 1000;  
        long seconds = span % 60;  
  
        span = span / 60;  
        long mins = span % 60;  
  
        span = span / 60;  
        long hours = span % 24;  
  
        span = span / 24;  
        long days = span;  
        return (new Formatter()).format("%1$d天 %2$02d:%3$02d:%4$02d.%5$03d",  
                days, hours, mins, seconds, minseconds).toString();  
    }  
} 